<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="请输入1-100之间的整数">
<input type="button" value="猜一猜" onclick="f()">
<h3>
    结果:<span></span>
</h3>
<script>
    //得到一个1-100之间的随机整数
    let x = parseInt(Math.random()*100)+1;
    console.log(x);
    //得到文本框
    let i = document.querySelector("input");
    let s = document.querySelector("span");
    let count =0;
    function f() {
        count++;
        if (isNaN(i.value)){
            s.innerText = "输入错误";
            return;
        }
        if (i.value>x) {
            s.innerText = "猜大了!"
        } else if (i.value<x) {
            s.innerText = "猜小了!"
        } else {
            s.innerText = "恭喜你第"+count+"次猜对了!"
        }
    }
</script>
</body>
</html>